EN 2349-001:2022
(Main)Aerospace series - Requirements and test procedures for switching devices
Aerospace series - Requirements and test procedures for switching devices
This document specifies the requirements and test procedures of switching devices for use in aircraft
electrical systems to EN 2282.
Luft- und Raumfahrt - Anforderungen und Prüfverfahren für Schaltelemente
Dieses Dokument legt die Anforderungen und Prüfverfahren für Schaltelemente zur Anwendung in elektrischen Anlagen von Luftfahrzeugen nach EN 2282 fest.
Série aérospatiale - Exigences et procédures d'essais des appareils de commutation
Aeronavtika - Zahteve in preskusni postopki za stikalne naprave
Ta dokument določa zahteve in preskusne postopke za stikalne naprave za uporabo v letalskih električnih sistemih v skladu s standardom EN 2282.
General Information
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2022
Aeronavtika - Zahteve in preskusni postopki za stikalne naprave
Aerospace series - Requirements and test procedures for switching devices
Luft- und Raumfahrt - Anforderungen und Prüfverfahren für Schaltelemente
Série aérospatiale - Exigences et procédures d'essais des appareils de commutation
Ta slovenski standard je istoveten z: EN 2349-001:2022
ICS:
29.130.01 Stikalne in krmilne naprave Switchgear and controlgear
na splošno in general
49.060 Letalska in vesoljska Aerospace electric
električna oprema in sistemi equipment and systems
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN 2349-001
EUROPEAN STANDARD
NORME EUROPÉENNE
July 2022
EUROPÄISCHE NORM
ICS 49.060
English Version
Aerospace series - Requirements and test procedures for
switching devices
Série aérospatiale - Exigences et procédures d'essais Luft- und Raumfahrt - Anforderungen und
des appareils de commutation Prüfverfahren für Schaltelemente
This European Standard was approved by CEN on 14 October 2018.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2022 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2349-001:2022 E
worldwide for CEN national Members.
Contents Page
European Foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 5
4 Characteristics . 5
5 Requirements and test procedures . 7
6 Qualification. 38
7 Verification tests . 40
8 Batch acceptance . 41
9 Periodic tests to maintain qualification . 41
European Foreword
This document (EN 2349-001:2022) has been prepared by the Aerospace and Defence Industries
Association of Europe — Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
ASD, prior to its presentation to CEN.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by January 2023, and conflicting national standards shall
be withdrawn at the latest by January 2023.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,
Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North
Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United
Kingdom.
1 Scope
This document specifies the requirements and test procedures of switching devices for use in aircraft
electrical systems to EN 2282.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
EN 2242, Aerospace series — Crimping of electric cables with conductors defined by EN 2083, EN 4434 and
EN 2346
EN 2282, Aerospace series — Characteristics of aircraft electrical supplies
EN 2591-303, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 303: Cold/low pressure and damp heat
EN 2591-315, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 315: Fluid resistance
EN 2591-409, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 409: Contact retention in insert
EN 2591-412, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 412: Contact insertion and extraction forces
EN 2591-415, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 415: Test probe damage (female contacts)
EN 2591-417, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 417: Tensile strength (crimped connection)
EN 2591-418, Aerospace series — Elements of electrical and optical connection — Test methods —
Part 418: Gauge insertion/extraction forces (female contacts)
EN 3155-001, Aerospace series — Electrical contacts used in elements of connection — Part 001: Technical
specification
1)
EN 4232, Aerospace series — Contactors — Terminal strength
EN 9133, Aerospace series — Quality Management Systems — Qualification Procedure for Aerospace
Standard Products
EN 60068-2-17, Environmental testing — Part 2: Tests — Test Q: Sealing
1) In preparation at the date of publication of this document.
2)
ISO 2669, Environmental tests for aircraft equipment — Steady-state acceleration
ISO 2678, Environmental tests for aircraft equipment — Insulation resistance and high voltage tests for
2)
electrical equipment
2)
ISO 7137:1987, Aircraft — Environmental conditions and test procedures for airborne equipment
ISO 2859-1, Sampling procedures for inspection by attributes — Part çi1: Sampling schemes indexed by
2)
acceptance quality limit (AQL) for lot-by-lot inspection
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at http://www.iso.org/obp
• IEC Electropedia: available at http://www.electropedia.org/
3.1
switching devices
relays with plug-socket holders and/or contactors
The switching devices are designed for the rated voltage specified. All test voltages are related to the
rated voltage specified.
The switching devices are designed for the rated current specified, related to a resistive load.
3.2
data relating to currents and voltages
unless otherwise stated, all data on a.c. values are effective values
A no load circuit is any combination of loads up to 10 mA, 50 mV.
4 Characteristics
4.1 Construction
4.1.1 Metal parts
All metal parts used in the construction of switching components shall be resistant to or protected against
corrosion. Dissimilar metals which are in direct contact shall be protected against electrochemical
corrosion.
2) Published by: ISO International Organization for Standardization http://www.iso.ch/
4.1.2 Insulants
Insulants shall be of non-inflammable or self-extinguishing materials and shall not emit any noxious or
explosive vapours which could cause an explosion.
In addition, the insulating materials shall be resistant to mould.
Insulating materials and protective coatings which may possibly break, crack or splinter shall not be used.
4.1.3 Leakage current paths
The leakage paths between live parts which are insulated from each other shall be such that no arcing or
other damage arising from the application or from environmental conditions can occur.
4.1.4 Mounting
Mounting of the switching devices shall conform to the product standard.
4.2 Description
4.2.1 Function
The switching devices shall be designed for rated voltages to EN 2282.
They shall be designed in such a way that they will switch the contact loads described in the product
standards without failure throughout their service life.
The environmental conditions required shall in no way lead to impairment or reduction of the
performance of the switching device.
The product standards shall state that switching devices with changeover contacts are suitable for
changing over the loads of unrelated a.c. circuits.
4.2.2 Electrical connections
4.2.2.1 Relays and contactors
The construction, form and surface characteristics of the contact pins shall comply with the requirements
of the product standard.
4.2.2.2 Plug-socket holders
The construction, form and function of the socket shall comply with the requirements of the product
standard.
The plug-socket holder shall be provided with a suitable holding device to ensure fit and retention of the
socket contact. The socket contact shall be designed so that the electric wiring specified in the product
standards can be connected.
The contact connections of relays and plug-socket holders shall comply with the electrical and mechanical
requirements of the product standards.
4.2.2.3 Earth connections
Mounting of the switching devices shall provide a perfect physical connection with the housing of the
switching device.
4.2.2.4 Type designation
See product standard.
5 Requirements and test procedures
5.1 General requirements
The switching device shall meet the requirements of the product standard.
Relays with plug-socket holders shall be regarded as a unit.
5.1.1 Normal environmental conditions for tests
Ambient temperature: (23 ± 5) °C (unless otherwise specified):
• Pressure: 84 kPa to 106 kPa;
• Relative humidity: 45 % to 75 %.
5.1.2 Electric wiring
5.1.2.1 Relays with plug-socket holders
For qualification testing the wiring specified in the product standards shall be used.
5.1.2.2 Contactors
For qualification testing, wiring suitable for the contact loads specified shall be used.
5.1.3 Sockets
Sockets contacts shall be in accordance with EN 3155-001.
5.2 Functional characteristics
5.2.1 Visual inspection
Visual inspection shall be carried out to ensure that the materials, construction, make-up, marking and
finishing comply with the specifications. The visual inspection shall be carried out with the naked eye
only.
5.2.2 Dimensions
Tests shall be carried out to ensure that dimensions and weight conform to the requirements of the
product standard.
5.2.3 Strength of connections
5.2.3.1 Relays with plug-socket holder
Contact pins
Test procedure
The contact pins shall be tested with a force in compliance with the product standard in the axial direction
related to the connector pin, for a period of 15 s to 30 s.
Test criteria
No sign of loosening, breakage of the pins, crack formation or splitting of the insulating material nor any
other damage shall be visible which would impair the function of the relay within the limit values
prescribed.
Verification test: A (see Table 6).
5.2.3.2 Retention of socket in insert
Test procedure
The test shall be carried out in accordance with EN 2591-409.
For preloads see Table 1.
Table 1
Socket size Preload Test load
N N
± 0,5 ± 0,5
20 90
16 13,5 110
12 135
Test criteria
The change in position of the socket during and/or after the application of the force shall not be greater
than 0,3 mm. There shall be no visible sign of damage.
5.2.3.3 Strength of attachment bolts
Test procedure
The relay and plug-socket holder shall be attached to the mounting plate at the torque specified in the
product standard.
Test criteria
The plug-socket holder shall withstand one and a half time the torque value specified in the p
...
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